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Harmonic Drive SE strain wave gear set consisting of wave generator bearing (top left), flexspline cup (top right) and circular spline ring (bottom). Strain wave gearing (also known as harmonic gearing ) is a type of mechanical gear system that uses a flexible spline with external teeth, which is deformed by a rotating elliptical plug to engage ...
This planetary gear train consists of a sun gear (yellow), planet gears (blue) and carrier (green) inside a ring gear (red) An epicyclic gear train (also known as a planetary gearset) is a gear reduction assembly consisting of two gears mounted so that the center of one gear (the "planet") revolves around the center of the other (the "sun").
The sun and planet gear converted the vertical motion of a beam, driven by a steam engine, into circular motion using a 'planet', a cogwheel fixed at the end of the connecting rod (connected to the beam) of the engine. With the motion of the beam, this revolved around, and turned, the 'sun', a second rotating cog fixed to the drive shaft, thus ...
Planetary differential used to drive a chart recorder c. 1961. The motors drive the Sun and annular gears, while the output is taken from the planet gear carrier. This gives 3 different speeds depending on which motors are on. Non-automotive uses of differentials include performing analogue arithmetic. Two of the differential's three shafts are ...
A gear train or gear set is a machine element of a mechanical system formed by mounting two or more gears on a frame such that the teeth of the gears engage.. Gear teeth are designed to ensure the pitch circles of engaging gears roll on each other without slipping, providing a smooth transmission of rotation from one gear to the next. [2]
The input always drives M1. In all forward speeds torque must be transferred between planet gears S1 and S2, since only S1 planets engage the input M1 and only S2 planets engage the output R1. In reverse gear the Ravigneaux behaves like an ordinary planetary system, with the second system just going along for the ride with no load.
There is no equivalent mechanical gear system, since the two rotating gears are physically isolated from each other and only interact magnetically. In addition, there are "cycloidal drive" gears with a gear ratio similar to planetary drives, also called "epicyclic" or "eccentric" gears. Magnetic gears advantages: Leak proof mechanical coupling
A hub gear, [1] internal-gear hub, [2] internally geared hub [3] or just gear hub [4] is a gear ratio changing system commonly used on bicycles that is implemented with planetary or epicyclic gears. The gears and lubricants are sealed within the shell of the hub gear, in contrast with derailleur gears where the gears and mechanism are exposed ...